On the nonexistence of limit cycles of certain quadratic systems

zbMath0908.34017MaRDI QIDQ1266292

Wei Yin Ye

Publication date: 7 March 1999

Published in: Chinese Annals of Mathematics. Series B (Search for Journal in Brave)

zbMATH Keywords

limit cyclesDulac functionseparatrixquadratic differential systemsfocal quantity of fine focus

Mathematics Subject Classification ID

Topological structure of integral curves, singular points, limit cycles of ordinary differential equations (34C05)

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